Optical imaging lens

ABSTRACT

Present embodiments provide for an optical imaging lens. The optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element a sixth lens element, a seventh lens element and a eighth lens element positioned sequentially from an object side to an image side. Through arrangement of convex or concave surfaces of the eight lens elements, the length of the optical imaging lens may be shortened while providing better optical characteristics and imaging quality.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No.201710906237.X filed on Sep. 29, 2017.

TECHNICAL FIELD

The present disclosure relates to an optical imaging lens, andparticularly, to an optical imaging lens having eight lens elements.

BACKGROUND

Technologies for optical imaging lenses have been improving constantlyin recent years, and many designers have modified optical aberration anddispersion by increasing the number of lens in an optical imaging lens.As a result, the distance between the object side of the first lens ofthe optical image lens and an image plane along an optical axis may beincreased while attempting to maintain good imaging quality. Thus, itmay not be desirable to decrease the thicknesses of mobile phones,digital cameras, and car lenses, etc.

Accordingly, there is a need to decrease the thickness of an opticalimaging lens when maintaining a good imaging quality.

SUMMARY

The present disclosure provides for an optical imaging lens. Bydesigning the convex and/or concave surfaces of the eight lens elements,the imaging quality and yield may be increased.

In the present disclosure, parameters used herein may be chosen from butnot limited to parameters listed below:

Parameter Definition T1 A thickness of the first lens element along theoptical axis G12 An air gap between the first lens element and thesecond lens element along the optical axis T2 A thickness of the secondlens element along the optical axis G23 An air gap between the secondlens element and the third lens element along the optical axis T3 Athickness of the third lens element along the optical axis G34 An airgap between the third lens element and the fourth lens element along theoptical axis T4 A thickness of the fourth lens element along the opticalaxis G45 An air gap between the fourth lens element and the fifth lenselement along the optical axis T5 A thickness of the fifth lens elementalong the optical axis G56 An air gap between the fifth lens element andthe sixth lens element along the optical axis T6 A thickness of thesixth lens element along the optical axis G67 An air gap between thesixth lens element and the seventh lens element along the optical axisT7 A thickness of the seventh lens element along the optical axis G78 Anair gap between the seventh lens element and the eighth lens elementalong the optical axis T8 A thickness of the eighth lens element alongthe optical axis G8F An air gap between the eighth lens element and thefiltering unit along the optical axis TF A thickness of the filteringunit along the optical axis GFP An air gap between the filtering unitand the image plane along the optical axis f1 A focal length of thefirst lens element f2 A focal length of the second lens element f3 Afocal length of the third lens element f4 A focal length of the fourthlens element f5 A focal length of the fifth lens element f6 A focallength of the sixth lens element f7 A focal length of the seventh lenselement f8 A focal length of the eighth lens element n1 A refractiveindex of the first lens element n2 A refractive index of the second lenselement n3 A refractive index of the third lens element n4 A refractiveindex of the fourth lens element n5 A refractive index of the fifth lenselement n6 A refractive index of the sixth lens element n7 A refractiveindex of the seventh lens element n8 A refractive index of the eighthlens element V1 An Abbe number of the first lens element V2 An Abbenumber of the second lens element V3 An Abbe number of the third lenselement V4 An Abbe number of the fourth lens element V5 An Abbe numberof the fifth lens element V6 An Abbe number of the sixth lens element V7An Abbe number of the seventh lens element V8 An Abbe number of theeighth lens element HFOV Half Field of View of the optical imaging lensFno F-number of the optical imaging lens EFL An effective focal lengthof the optical imaging lens TTL A distance from the object-side surfaceof the first lens element to the image plane along the optical axis ALTA sum of the thicknesses of all eight lens elements from the first lenselement to the eighth lens element along the optical axis AAG A sum ofthe seven air gaps from the first lens element to the eighth lenselement along the optical axis BFL A back focal length of the opticalimaging lens/A distance from the image-side surface of a eighth lenselement to the image plane along the optical axis TL A distance from theobject-side surface of the first lens element to the image-side surfaceof the eighth lens element along the optical axis Tmax A maximumthickness of all eight lens elements from the first lens element to theeighth lens element along the optical axis Tmin A minimum thickness ofall eight lens elements from the first lens element to the eighth lenselement along the optical axis

According to one embodiment of the present disclosure, an opticalimaging lens may comprise a first lens element, a second lens element, athird lens element, a fourth lens element, a fifth lens element, a sixthlens element, a seventh lens element and an eighth lens elementsequentially from an object side to an image side along an optical axis.Each of the first, second, third, fourth, fifth, sixth, seventh andeighth lens elements may have varying refracting power in someembodiments. Additionally, the first lens element to the eight lenselement each may comprise an object-side surface facing toward theobject side and allowing imaging rays to pass through and an image-sidesurface facing toward the image side and allowing the imaging rays topass through. Moreover, the object-side surface of the first lenselement may comprise a convex portion in a vicinity of the optical axis;the image-side surface of the second lens element may comprise a concaveportion in a vicinity of the optical axis; the image-side surface of thethird lens element may comprise a convex portion in a vicinity of aperiphery of the third lens element; the object-side surface of thefourth lens element may comprise a concave portion in a vicinity of aperiphery of the fourth lens element; the fifth lens element may be aplastic lens; the image-side surface of the sixth lens element maycomprise a convex portion in a vicinity of the optical axis; theobject-side surface of the seventh lens element may comprise a convexportion in a vicinity of the optical axis; the eighth lens element maybe a plastic lens; an Abbe number of the first lens element isrepresented by V1, an Abbe number of the second lens element isrepresented by V2, an Abbe number of the third lens element isrepresented by V3, an Abbe number of the fourth lens element isrepresented by V4, an Abbe number of the fifth lens element isrepresented by V5, an Abbe number of the sixth lens element isrepresented by V6, an Abbe number of the seventh lens element isrepresented by V7, an Abbe number of the eighth lens element isrepresented by V8, only the first second, third, fourth, fifth, sixth,seventh and eighth lens elements may have refracting power, and theoptical imaging lens satisfies an inequality (1):(V5+V6+V7+V8)−(V1+V2+V3+V4)≥35.000;

An embodiment of the optical imaging lens may satisfy any one ofinequalities as follows:

AAG/(G67+G78)≤6.000  inequality (2);

ALT/(T2+T4)≥5.500  inequality (3);

TL/EFL≤2.800  inequality (4);

(T3+T5)/T8≥2.000  inequality (5);

TTL/(T5+T6)≤6.200  inequality (6);

(T7+G78)/(T1+G12)≥1.500  inequality (7);

BFL/T min≤6.100  inequality (8);

T max/(T2+G23)≤3.000  inequality (9);

(T4+T5)/(G34+G45+G56)≤2.500  inequality (10);

T7/T8≥1.500  inequality (11);

(G45+G78)/(T1+T2)≥1.000  inequality (12);

TL/BFL≥4.300  inequality (13);

(T3+T6)/(G12+G23+G34)≥1.900  inequality (14);

AAG/(G56+G67+G78)≤3.000  inequality (15);

ALT/(T5+T6)≤4.000  inequality (16);

EFL/T max≥3.000  inequality (17);

(T7+T8)/T3≤2.200  inequality (18);

(T2+T4)/(G23+G45)≤3.000  inequality (19); and

AAG/(G12+G34+G56+G67)≥2.500  inequality (20).

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 depicts a cross-sectional view of one single lens elementaccording to one embodiment of the present disclosure;

FIG. 2 depicts a schematic view of a relation between a surface shapeand an optical focus of a lens element;

FIG. 3 depicts a schematic view of a first example of a surface shapeand an effective radius of a lens element;

FIG. 4 depicts a schematic view of a second example of a surface shapeand an effective radius of a lens element;

FIG. 5 depicts a schematic view of a third example of a surface shapeand an effective radius of a lens element;

FIG. 6 depicts a cross-sectional view of a first embodiment of anoptical imaging lens having eight lens elements according to oneembodiment of the present disclosure;

FIG. 7 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a first embodiment of an optical imaginglens according to the present disclosure;

FIG. 8 depicts a table of optical data for each lens element of anoptical imaging lens of a first embodiment of the present disclosure;

FIG. 9 depicts a table of aspherical data of a first embodiment of anoptical imaging lens according to the present disclosure;

FIG. 10 depicts a cross-sectional view of a second embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 11 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a second embodiment of an opticalimaging lens according to one embodiment of the present disclosure;

FIG. 12 depicts a table of optical data for each lens element of anoptical imaging lens of a second embodiment of the present disclosure;

FIG. 13 depicts a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 depicts a cross-sectional view of a third embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 15 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a third embodiment of an optical imaginglens according the present disclosure;

FIG. 16 depicts a table of optical data for each lens element of theoptical imaging lens of a third embodiment of the present disclosure;

FIG. 17 depicts a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 depicts a cross-sectional view of a fourth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 19 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a fourth embodiment of an opticalimaging lens according the present disclosure;

FIG. 20 depicts a table of optical data for each lens element of anoptical imaging lens of a fourth embodiment of the present disclosure;

FIG. 21 depicts a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 depicts a cross-sectional view of a fifth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 23 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a fifth embodiment of the opticalimaging lens according the present disclosure;

FIG. 24 depicts a table of optical data for each lens element of theoptical imaging lens of a fifth embodiment of the present disclosure;

FIG. 25 depicts a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 depicts a cross-sectional view of a sixth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 27 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a sixth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 28 depicts a table of optical data for each lens element of a sixthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 29 depicts a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 depicts a cross-sectional view of a seventh embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 31 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a seventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 32 depicts a table of optical data for each lens element of aseventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 33 depicts a table of aspherical data of a seventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 34 depicts a cross-sectional view of an eighth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 35 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of an eighth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 36 depicts a table of optical data for each lens element of aneighth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 37 depicts a table of aspherical data of an eighth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 38 depicts a cross-sectional view of a ninth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 39 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a ninth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 40 depicts a table of optical data for each lens element of a ninthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 41 depicts a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 depicts a cross-sectional view of a tenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 43 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a tenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 44 depicts a table of optical data for each lens element of a tenthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 45 depicts a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 46 depicts a cross-sectional view of an eleventh embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 47 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of an eleventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 48 depicts a table of optical data for each lens element of aneleventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 49 depicts a table of aspherical data of an eleventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 50 depicts a cross-sectional view of a twelfth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 51 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a twelfth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 52 depicts a table of optical data for each lens element of atwelfth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 53 depicts a table of aspherical data of a twelfth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 54 depicts a cross-sectional view of a thirteenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 55 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a thirteenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 56 depicts a table of optical data for each lens element of athirteenth embodiment of an optical imaging lens according to thepresent disclosure;

FIG. 57 depicts a table of aspherical data of a thirteenth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 58 depicts a cross-sectional view of a fourteenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 59 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a fourteenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 60 depicts a table of optical data for each lens element of afourteenth embodiment of an optical imaging lens according to thepresent disclosure;

FIG. 61 depicts a table of aspherical data of a fourteenth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 62 depicts a cross-sectional view of a fifteenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 63 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a fifteenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 64 depicts a table of optical data for each lens element of afifteenth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 65 depicts a table of aspherical data of a fifteenth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 66 depicts a cross-sectional view of a sixteenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 67 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a sixteenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 68 depicts a table of optical data for each lens element of asixteenth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 69 depicts a table of aspherical data of a sixteenth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 70 depicts a cross-sectional view of a seventeenth embodiment of anoptical imaging lens having eight lens elements according to the presentdisclosure;

FIG. 71 depicts a chart of longitudinal spherical aberration and otherkinds of optical aberrations of a seventeenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 72 depicts a table of optical data for each lens element of aseventeenth embodiment of an optical imaging lens according to thepresent disclosure;

FIG. 73 depicts a table of aspherical data of a seventeenth embodimentof the optical imaging lens according to the present disclosure;

FIGS. 74A to 74D are value tables reflecting determined values of T1,G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF,GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) as determined inspecific example embodiments.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons having ordinary skill in the artwill understand other varieties for implementing example embodiments,including those described herein. The drawings are not limited tospecific scale and similar reference numbers are used for representingsimilar elements. As used in the disclosures and the appended claims,the terms “example embodiment,” “exemplary embodiment,” and “presentembodiment” do not necessarily refer to a single embodiment, although itmay, and various example embodiments may be readily combined andinterchanged, without departing from the scope or spirit of the presentdisclosure. Furthermore, the terminology as used herein is for thepurpose of describing example embodiments only and is not intended to bea limitation of the disclosure. In this respect, as used herein, theterm “in” may include “in” and “on,” and the terms “a,” “an,” and “the”may include singular and plural references. Furthermore, as used herein,the term “by” may also mean “from,” depending on the context.Furthermore, as used herein, the term “if” may also mean “when” or“upon,” depending on the context. Furthermore, as used herein, the words“and/or” may refer to and encompass any and all possible combinations ofone or more of the associated listed items.

In the present specification, the description “a lens element havingpositive refracting power (or negative refracting power)” means that theparaxial refracting power of the lens element in Gaussian optics ispositive (or negative). The description “An object-side (or image-side)surface of a lens element” may only include a specific region of thatsurface of the lens element where imaging rays are capable of passingthrough that region, namely the clear aperture of the surface. Theaforementioned imaging rays can be classified into two types, chief rayLc and marginal ray Lm. Taking a lens element depicted in FIG. 1 as anexample, I is an optical axis and the lens element is rotationallysymmetric, where the optical axis I is the axis of symmetry. The regionA of the lens element is defined as “a portion in a vicinity of theoptical axis,” and the region C of the lens element is defined as “aportion in a vicinity of a periphery of the lens element.” Besides, thelens element may also have an extending portion E extended radially andoutwardly from the region C, namely the portion outside of the clearaperture of the lens element. The extending portion E is usually usedfor physically assembling the lens element into an optical imaging lenssystem. Under normal circumstances, the imaging rays would not passthrough the extending portion E because those imaging rays may only passthrough the clear aperture. The structures and shapes of theaforementioned extending portion E are only examples for technicalexplanation, the structures and shapes of lens elements should not belimited to these examples. Note that the extending portions of the lenselement surfaces depicted in the following embodiments are partiallyomitted.

The following criteria are provided for determining the shapes and theportions of lens element surfaces set forth in the presentspecification. These criteria mainly determine the boundaries ofportions under various circumstances including the portion in a vicinityof the optical axis, the portion in a vicinity of a periphery of a lenselement surface, and other types of lens element surfaces such as thosehaving multiple portions.

FIG. 1 is a radial cross-sectional view of a lens element. Beforedetermining boundaries of those aforesaid portions, two referentialpoints should be defined first, central point and transition point. Thecentral point of a surface of a lens element is a point of intersectionof that surface and the optical axis. The transition point is a point ona surface of a lens element, where the tangent line of that point isperpendicular to the optical axis. Additionally, if multiple transitionpoints appear on one single surface, then these transition points aresequentially named along the radial direction of the surface withnumbers starting from the first transition point. For instance, thefirst transition point (closest one to the optical axis), the secondtransition point, and the Nth transition point (farthest one to theoptical axis within the scope of the clear aperture of the surface). Theportion of a surface of the lens element between the central point andthe first transition point is defined as the portion in a vicinity ofthe optical axis. The portion located radially outside of the Nthtransition point (but still within the scope of the clear aperture) isdefined as the portion in a vicinity of a periphery of the lens element.In some embodiments, there are other portions existing between theportion in a vicinity of the optical axis and the portion in a vicinityof a periphery of the lens element; the numbers of portions depend onthe numbers of the transition point(s). In addition, the radius of theclear aperture (or a so-called effective radius) of a surface is definedas the radial distance from the optical axis I to a point ofintersection of the marginal ray Lm and the surface of the lens element.

Referring to FIG. 2, determining the shape of a portion is convex orconcave depends on whether a collimated ray passing through that portionconverges or diverges. That is, while applying a collimated ray to aportion to be determined in terms of shape, the collimated ray passingthrough that portion will be bended and the ray itself or its extensionline will eventually meet the optical axis. The shape of that portioncan be determined by whether the ray or its extension line meets(intersects) the optical axis (focal point) at the object-side orimage-side. For instance, if the ray itself intersects the optical axisat the image side of the lens element after passing through a portion,i.e., the focal point of this ray is at the image side (see point R inFIG. 2), the portion will be determined as having a convex shape. On thecontrary, if the ray diverges after passing through a portion, theextension line of the ray intersects the optical axis at the object sideof the lens element, i.e., the focal point of the ray is at the objectside (see point M in FIG. 2), that portion will be determined as havinga concave shape. Therefore, referring to FIG. 2, the portion between thecentral point and the first transition point has a convex shape, theportion located radially outside of the first transition point has aconcave shape, and the first transition point is the point where theportion having a convex shape changes to the portion having a concaveshape, namely the border of two adjacent portions. Alternatively, thereis another common way for a person with ordinary skill in the art totell whether a portion in a vicinity of the optical axis has a convex orconcave shape by referring to the sign of an “R” value, which is the(paraxial) radius of curvature of a lens surface. The R value which iscommonly used in conventional optical design software such as Zemax andCodeV. The R value usually appears in the lens data sheet in thesoftware. For an object-side surface, positive R means that theobject-side surface is convex, and negative R means that the object-sidesurface is concave. Conversely, for an image-side surface, positive Rmeans that the image-side surface is concave, and negative R means thatthe image-side surface is convex. The result found by using this methodshould be consistent as by using the other way mentioned above, whichdetermines surface shapes by referring to whether the focal point of acollimated ray is at the object side or the image side.

For none transition point cases, the portion in a vicinity of an opticalaxis is defined as the portion between about 0-50% of an effectiveradius (radius of the clear aperture) of a surface, whereas the portionin a vicinity of a periphery of the lens element is defined as theportion between about 50-100% of the effective radius (radius of theclear aperture) of the surface.

Referring to the first example depicted in FIG. 3, only one transitionpoint, namely a first transition point, may appear within the clearaperture of the image-side surface of the lens element. Portion I is aportion in a vicinity of the optical axis, and portion II is a portionin a vicinity of a periphery of the lens element. The portion in avicinity of the optical axis is determined as having a concave surfacedue to the R value at the image-side surface of the lens element ispositive. The shape of the portion in a vicinity of a periphery of thelens element may be different from that of the radially inner adjacentportion, i.e., the shape of the portion in a vicinity of a periphery ofthe lens element may be different from the shape of the portion in avicinity of the optical axis; the portion in a vicinity of a peripheryof the lens element has a convex shape.

Referring to the second example depicted in FIG. 4, a first transitionpoint and a second transition point exist on the object-side surface(within the clear aperture) of a lens element. In which portion I is theportion in a vicinity of the optical axis, and portion III is theportion in a vicinity of a periphery of the lens element. The portion ina vicinity of the optical axis has a convex shape because the R value atthe object-side surface of the lens element is positive. The portion ina vicinity of a periphery of the lens element (portion III) has a convexshape. What is more, there may be another portion having a concave shapeexisting between the first and second transition point (portion II).

Referring to a third example depicted in FIG. 5, no transition pointexists on the object-side surface of the lens element. In this case, theportion between about 0˜50% of the effective radius (radius of the clearaperture) is determined as the portion in a vicinity of the opticalaxis, and the portion between about 50˜100% of the effective radius isdetermined as the portion in a vicinity of a periphery of the lenselement. The portion in a vicinity of the optical axis of theobject-side surface of the lens element is determined as having a convexshape due to its positive R value, and the portion in a vicinity of aperiphery of the lens element is determined as having a convex shape aswell.

Several exemplary embodiments and associated optical data will now beprovided to illustrate non-limiting examples of optical imaging lenssystems having good optical characteristics while increasing the fieldof view. Reference is now made to FIGS. 6-9. FIG. 6 illustrates anexample cross-sectional view of an optical imaging lens 1 having eightlens elements according to a first example embodiment. FIG. 7 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 1 according to the firstexample embodiment. FIG. 8 illustrates an example table of optical dataof each lens element of the optical imaging lens 1 according to thefirst example embodiment. FIG. 9 depicts an example table of asphericaldata of the optical imaging lens 1 according to the first exampleembodiment.

As shown in FIG. 6, the optical imaging lens 1 of the present embodimentmay comprise, in order from an object side A1 to an image side A2 alongan optical axis, an aperture stop 100, a first lens element 110, asecond lens element 120, a third lens element 130, a fourth lens element140, a fifth lens element 150 a sixth lens element 160, a seventh lenselement 170 and an eighth lens element 180. A filtering unit 190 and animage plane IM1 of an image sensor (not shown) may be positioned at theimage side A2 of the optical imaging lens 1. Each of the first, second,third, fourth, fifth sixth, seventh and eighth lens elements 110, 120,130, 140, 150, 160, 170, 180 and the filtering unit 190 may comprise anobject-side surface 111/121/131/141/151/161/171/181/191 facing towardthe object side A1 and an image-side surface112/122/132/142/152/162/172/182/192 facing toward the image side A2. Theexample embodiment of the filtering unit 190 illustrated may be an IRcut filter (infrared cut filter) positioned between the eighth lenselement 180 and the image plane IM1. The filtering unit 190 mayselectively absorb light passing optical imaging lens 1 that has aspecific wavelength. For example, if IR light is absorbed, IR lightwhich is not seen by human eyes may be prohibited from producing animage on the image plane IM1.

Exemplary embodiments of each lens element of the optical imaging lens 1will now be described with reference to the drawings. The lens elementsof the optical imaging lens 1 may be constructed using plastic materialsin this embodiment.

An example embodiment of the first lens element 110 may have positiverefracting power. The object-side surface 111 may comprise a convexportion 1111 in a vicinity of an optical axis and a convex portion 1112in a vicinity of a periphery of the first lens element 110. Theimage-side surface 112 may comprise a concave portion 1121 in a vicinityof the optical axis and a concave portion 1122 in a vicinity of theperiphery of the first lens element 110.

An example embodiment of the second lens element 120 may have negativerefracting power. The object-side surface 121 may comprise a convexportion 1211 in a vicinity of the optical axis and a concave portion1212 in a vicinity of a periphery of the second lens element 120. Theimage-side surface 122 may comprise a concave portion 1221 in a vicinityof the optical axis and a convex portion 1222 in a vicinity of theperiphery of the second lens element 120.

An example embodiment of the third lens element 130 may have positiverefracting power. The object-side surface 131 may comprise a convexportion 1311 in a vicinity of the optical axis and a convex portion 1312in a vicinity of a periphery of the third lens element 130. Theimage-side surface 132 may comprise a concave portion 1321 in a vicinityof the optical axis and a convex portion 1322 in a vicinity of theperiphery of the third lens element 130.

An example embodiment of the fourth lens element 140 may have negativerefracting power. The object-side surface 141 may comprise a convexportion 1411 in a vicinity of the optical axis and a concave portion1412 in a vicinity of a periphery of the fourth lens element 140. Theimage-side surface 142 may comprise a concave portion 1421 in a vicinityof the optical axis and a concave portion 1422 in a vicinity of theperiphery of the fourth lens element 140.

An example embodiment of the fifth lens element 150 may have positiverefracting power. The object-side surface 151 may comprise a convexportion 1511 in a vicinity of the optical axis and a convex portion 1512in a vicinity of a periphery of the fifth lens element 150. Theimage-side surface 152 may comprise a concave portion 1521 in a vicinityof the optical axis and a convex portion 1522 in a vicinity of theperiphery of the fifth lens element 150.

An example embodiment of the sixth lens element 160 may have positiverefracting power. The object-side surface 161 may comprise a concaveportion 1611 in a vicinity of the optical axis and a concave portion1612 in a vicinity of a periphery of the sixth lens element 160. Theimage-side surface 162 may comprise a convex portion 1621 in a vicinityof the optical axis and a convex portion 1622 in a vicinity of theperiphery of the sixth lens element 160.

An example embodiment of the seventh lens element 170 may have positiverefracting power. The object-side surface 171 may comprise a convexportion 1711 in a vicinity of the optical axis and a concave portion1712 in a vicinity of a periphery of the seventh lens element 170. Theimage-side surface 172 may comprise a concave portion 1721 in a vicinityof element 170.

An example embodiment of the eighth lens element 180 may have negativerefracting power. The object-side surface 181 may comprise a concaveportion 1811 in a vicinity of the optical axis and a concave portion1812 in a vicinity of a periphery of the eighth lens element 180. Theimage-side surface 182 may comprise a concave portion 1821 in a vicinityof the optical axis and a convex portion 1822 in a vicinity of theperiphery of the eighth lens element 180.

The aspherical surfaces including the object-side surface 111 and theimage-side surface 112 of the first lens element 110, the object-sidesurface 121 and the image-side surface 122 of the second lens element120, the object-side surface 131 and the image-side surface 132 of thethird lens element 130, the object-side surface 141 and the image-sidesurface 142 of the fourth lens element 140, the object-side surface 151and the image-side surface 152 of the fifth lens element 150, theobject-side surface 161 and the image-side surface 162 of the sixth lenselement 160, the object-side surface 171 and the image-side surface 172of the seventh lens element 170, and the object-side surface 181 and theimage-side surface 182 of the eighth lens element 180 may all be definedby the following aspherical formula (1):

$\begin{matrix}{{Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{2\; i} \times Y^{2\; i}}}}} & {{formula}\mspace{14mu} (1)}\end{matrix}$

wherein,

R represents the radius of curvature of the surface of the lens element;

Z represents the depth of the aspherical surface (i.e., theperpendicular distance between the point of the aspherical surface at adistance Y from the optical axis and the tangent plane of the vertex onthe optical axis of the aspherical surface);

Y represents the perpendicular distance between the point of theaspherical surface and the optical axis;

K represents a conic constant; and

a_(2i) represents an aspherical coefficient of 2i^(th) level.

Values of each aspherical parameter are shown in FIG. 9.

FIG. 7(a) shows the longitudinal spherical aberration, wherein thehorizontal axis of FIG. 7(a) defines the focus, and wherein the verticalaxis of FIG. 7(a) defines the field of view. FIG. 7(b) shows theastigmatism aberration in the sagittal direction, wherein the horizontalaxis of FIG. 7(b) defines the focus, and wherein the vertical axis ofFIG. 7(b) defines the image height. FIG. 7(c) shows the astigmatismaberration in the tangential direction, wherein the horizontal axis ofFIG. 7(c) defines the focus, and wherein the vertical axis of FIG. 7(c)defines the image height. FIG. 7(d) shows a variation of the distortionaberration, wherein the horizontal axis of FIG. 7(d) defines thepercentage, and wherein the vertical axis of FIG. 7(d) defines the imageheight. The three curves with different wavelengths (470 nm, 555 nm, 650nm) may represent that off-axis light with respect to these wavelengthsmay be focused around an image point. From the vertical deviation ofeach curve shown in FIG. 7(a), the offset of the off-axis light relativeto the image point may be within about ±0.025 mm. Therefore, the firstembodiment may improve the longitudinal spherical aberration withrespect to different wavelengths. Referring to FIG. 7(b), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field may fall within about ±0.03 mm. Referringto FIG. 7(c), the focus variation with respect to the three differentwavelengths (470 nm, 555 nm, 650 nm) in the whole field may fall withinabout ±0.04 mm. Referring to FIG. 7(d), the horizontal axis of FIG.7(d), the variation of the distortion aberration may be within about±6%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

The distance from the object-side surface 111 of the first lens element110 to the image plane IM1 along the optical axis (TTL) may be about6.773 mm. In accordance with TTL and these aberration values describedabove, the present embodiment may provide an optical imaging lens havinga shortened length when maintaining a good imaging quality.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 2 having eight lenselements according to a second example embodiment. FIG. 11 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 2 according to the secondexample embodiment. FIG. 12 shows an example table of optical data ofeach lens element of the optical imaging lens 2 according to the secondexample embodiment. FIG. 13 shows an example table of aspherical data ofthe optical imaging lens 2 according to the second example embodiment.The reference numbers labeled in the present embodiment may be similarto those in the first embodiment for the similar elements, but here thereference numbers may be initialed with 2; for example, reference number231 may label the object-side surface of the third lens element 230,reference number 232 may label the image-side surface of the third lenselement 230, etc.

As shown in FIG. 10, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 200, a first lens element210, a second lens element 220, a third lens element 230, a fourth lenselement 240, a fifth lens element 250 a sixth lens element 260, aseventh lens element 270 and an eighth lens element 280.

The arrangements of convex or concave surface structures including theobject-side surfaces 211, 221, 231, 251, 261, 271, 281 and theimage-side surfaces 212, 222, 232, 242, 252, 262, 272, 282 may begenerally similar to the optical imaging lens 1, but the differencesbetween the optical imaging lens 1 and the optical imaging lens 2 mayinclude the convex or concave surface structures of the object-sidesurface 241. Additional differences may include a radius of curvature,refracting power, a thickness, an aspherical data, and an effectivefocal length of each lens element. More specifically, the object-sidesurface 241 of the fourth lens element 240 may comprise a concaveportion 2411 in a vicinity of the optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 12 for the opticalcharacteristics of each lens element in the optical imaging lens 2 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 11(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.018 mm. Referring to FIG. 11(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.02 mm. Referring to FIG. 11(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.04 mm.Referring to FIG. 11(d), the variation of the distortion aberration ofthe optical imaging lens 2 may be within about ±2%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, TTL may be smaller, thisembodiment may have smaller values of astigmatism aberration anddistortion aberration so that it may have better imaging quality.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 3 having eight lenselements according to a third example embodiment. FIG. 15 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 3 according to the third exampleembodiment. FIG. 16 shows an example table of optical data of each lenselement of the optical imaging lens 3 according to the third exampleembodiment. FIG. 17 shows an example table of aspherical data of theoptical imaging lens 3 according to the third example embodiment. Thereference numbers labeled in the present embodiment may be similar tothose in the first embodiment for the similar elements, but here thereference numbers may be initialed with 3; for example, reference number331 may label the object-side surface of the third lens element 330,reference number 332 may label the image-side surface of the third lenselement 330, etc.

As shown in FIG. 14, the optical imaging lens 3 of the third exampleembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 300, a first lens element310, a second lens element 320, a third lens element 330, a fourth lenselement 340, a fifth lens element 350 a sixth lens element 360, a sevenlens element 370 and an eighth lens element 380.

The arrangements of the convex or concave surface structures in thethird example embodiment, including the object-side surfaces 311, 321,331, 341, 351, 361, 371, 381 and the image-side surfaces 312, 322, 332,342, 352, 362, 372, 382 may be generally similar to the optical imaginglens 1 (FIG. 6 depicting the first example embodiment). Differencesbetween the optical imaging lens 1 and the optical imaging lens 3 mayinclude a radius of curvature, a thickness, aspherical data, and aneffective focal length of each lens element.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 16 for the opticalcharacteristics of each lens element in the optical imaging lens 3 ofthe third example embodiment.

From the vertical deviation of each curve shown in FIG. 15(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.018 mm. Referring to FIG. 15(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.025 mm. Referring to FIG.15(c), the focus variation with respect to the three differentwavelengths (470 nm, 555 nm, 650 nm) in the whole field may fall withinabout ±0.06 mm. Referring to FIG. 15(d), the variation of the distortionaberration of the optical imaging lens 3 may be within about ±5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration, astigmatismaberration, and distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 4 having eight lenselements according to a fourth example embodiment. FIG. 19 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 4 according to the fourthembodiment. FIG. 20 shows an example table of optical data of each lenselement of the optical imaging lens 4 according to the fourth exampleembodiment. FIG. 21 shows an example table of aspherical data of theoptical imaging lens 4 according to the fourth example embodiment. Thereference numbers labeled in the present embodiment may be similar tothose in the first example embodiment for the similar elements, but herethe reference numbers may be initialed with 4; for example, referencenumber 431 may label the object-side surface of the third lens element430, reference number 432 may label the image-side surface of the thirdlens element 430, etc.

As shown in FIG. 18, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 400, a first lens element410, a second lens element 420, a third lens element 430, a fourth lenselement 440, a fifth lens element 450 a sixth lens element 460, aseventh lens element 470 and an eighth lens element 480.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 411, 421, 431, 451, 461, 471, 481 and theimage-side surfaces 412, 422, 432, 442, 452, 462, 472, 482 may begenerally similar to the optical imaging lens 1, but the differencesbetween the optical imaging lens 1 and the optical imaging lens 4 mayinclude the convex or concave surface of the object-side surface 441.Additional differences may include a radius of curvature, refractingpower, a thickness, aspherical data, and an effective focal length ofeach lens element. More specifically, the object-side surface 441 of thefourth lens element 440 may comprise a concave portion 4411 in avicinity of the optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 20 for the opticalcharacteristics of each lens elements in the optical imaging lens 4 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 19(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.018 mm. Referring to FIG. 19(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.025 mm. Referring to FIG.19(c), the focus variation with respect to the three differentwavelengths (470 nm, 555 nm, 650 nm) in the whole field may fall withinabout ±0.025 mm. Referring to FIG. 19(d), the variation of thedistortion aberration of the optical imaging lens 4 may be within about±4%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration, astigmatismaberration, and distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 5 having eight lenselements according to a fifth example embodiment. FIG. 23 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 5 according to the fifthembodiment. FIG. 24 shows an example table of optical data of each lenselement of the optical imaging lens 5 according to the fifth exampleembodiment. FIG. 25 shows an example table of aspherical data of theoptical imaging lens 5 according to the fifth example embodiment. Thereference numbers labeled in the present embodiment may be similar tothose in the first embodiment for the similar elements, but here thereference numbers may be initialed with 5; for example, reference number531 may label the object-side surface of the third lens element 530,reference number 532 may label the image-side surface of the third lenselement 530, etc.

As shown in FIG. 22, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 500, a first lens element510, a second lens element 520, a third lens element 530, a fourth lenselement 540, a fifth lens element 550, a sixth lens element 560, aseventh lens element 570 and an eighth lens element 580.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 511, 521, 531, 541, 551, 561, 571, 581 and theimage-side surfaces 512, 522, 532, 542, 552, 562, 572, 582 may begenerally similar to the optical imaging lens 1, but the differencesbetween the optical imaging lens 1 (FIG. 6 depicting the first exampleembodiment) and the optical imaging lens 5 (FIG. 22 depicting the fifthexample embodiment) may include a radius of curvature, a thickness,aspherical data, and an effective focal length of each lens element.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. FIG. 24 depicts the opticalcharacteristics of each lens elements in the optical imaging lens 5 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 23(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.01 mm. Referring to FIG. 23(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.02 mm. Referring to FIG. 23(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.045 mm.Referring to FIG. 23(d), the variation of the distortion aberration ofthe optical imaging lens 5 may be within about ±4.5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration, astigmatismaberration, and distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 6 having eight lenselements according to a sixth example embodiment. FIG. 27 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 6 according to the sixthembodiment. FIG. 28 shows an example table of optical data of each lenselement of the optical imaging lens 6 according to the sixth exampleembodiment. FIG. 29 shows an example table of aspherical data of theoptical imaging lens 6 according to the sixth example embodiment. Thereference numbers labeled in the present embodiment are similar to thosein the first embodiment for the similar elements, but here the referencenumbers are initialed with 6; for example, reference number 631 maylabel the object-side surface of the third lens element 630, referencenumber 632 may label the image-side surface of the third lens element630, etc.

As shown in FIG. 26, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 600, a first lens element610, a second lens element 620, a third lens element 630, a fourth lenselement 640, a fifth lens element 650, a sixth lens element 660, aseventh lens element 670 and an eighth lens element 680.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 611, 621, 631, 641, 651, 661, 671, 681 and theimage-side surfaces 612, 622, 632, 642, 652, 662, 672, 682 may begenerally similar to the optical imaging lens 1 (FIG. 6 depicting thefirst example embodiment), but the differences between the opticalimaging lens 1 and the optical imaging lens 6 may include a radius ofcurvature, refracting power, a thickness, aspherical data, and aneffective focal length of each lens element.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 28 for the opticalcharacteristics of each lens elements in the optical imaging lens 6 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 27(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.06 mm. Referring to FIG. 27(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.06 mm. Referring to FIG. 23(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.16 mm.Referring to FIG. 27(d), the variation of the distortion aberration ofthe optical imaging lens 6 may be within about ±2.5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B

In comparison with the first embodiment, this embodiment may havesmaller values of astigmatism aberration and distortion aberration, sothat it may have better imaging quality.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 7 having eight lenselements according to a seventh example embodiment. FIG. 31 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 7 according to theseventh embodiment. FIG. 32 shows an example table of optical data ofeach lens element of the optical imaging lens 7 according to the seventhexample embodiment. FIG. 33 shows an example table of aspherical data ofthe optical imaging lens 7 according to the seventh example embodiment.The reference numbers labeled in the present embodiment are similar tothose in the first embodiment for the similar elements, but here thereference numbers are initialed with 7; for example, reference number731 may label the object-side surface of the third lens element 730,reference number 732 may label the image-side surface of the third lenselement 730, etc.

As shown in FIG. 30, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 700, a first lens element710, a second lens element 720, a third lens element 730, a fourth lenselement 740, a fifth lens element 750, a sixth lens element 760, seventhlens element 770 and an eighth lens element 780.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 711, 721, 731, 751, 761, 771 and the image-sidesurfaces 712, 722, 732, 742, 752, 762, 782 may be generally similar tothe optical imaging lens 1 (FIG. 6 depicting the first exampleembodiment), but the differences between the optical imaging lens 1 andthe optical imaging lens 7 may include the convex or concave surfacestructures of the object-side surfaces 741, 781 and the image-sidesurface 772. Additional differences may include a radius of curvature,refracting power, a thickness, aspherical data, and an effective focallength of each lens element. More specifically, the object-side surface741 of the fourth lens element 740 may comprise a concave portion 7411in a vicinity of the optical axis, the image-side surface 772 of theseventh lens element 770 may comprise a concave portion 7722 in avicinity of a periphery of the seventh lens element 770, and theobject-side surface 781 of the eighth lens element 780 may comprise aconvex portion 7812 in a vicinity of a periphery of the eighth lenselement 780.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 32 for the opticalcharacteristics of each lens elements in the optical imaging lens 7 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 31(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.025 mm. Referring to FIG. 31(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.03 mm. Referring to FIG. 31(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.04 mm.Referring to FIG. 31(d), the variation of the distortion aberration ofthe optical imaging lens 7 may be within about ±2%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration and distortionaberration, so that it may have better imaging quality.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 8 having eight lenselements according to an eighth example embodiment. FIG. 35 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 8 according to theeighth embodiment. FIG. 36 shows an example table of optical data ofeach lens element of the optical imaging lens 8 according to the eighthexample embodiment. FIG. 37 shows an example table of aspherical data ofthe optical imaging lens 8 according to the eighth example embodiment.The reference numbers labeled in the present embodiment are similar tothose in the first embodiment for the similar elements, but here thereference numbers are initialed with 8; for example, reference number831 may label the object-side surface of the third lens element 830,reference number 832 may label the image-side surface of the third lenselement 830, etc.

As shown in FIG. 34, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 800, a first lens element810, a second lens element 820, a third lens element 830, a fourth lenselement 840, a fifth lens element 850, a sixth lens element 860, aseventh lens element 870 and an eighth lens element 880.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 811, 821, 831, 851, 861, 871, 881 and theimage-side surfaces 812, 822, 832, 842, 852, 862, 872, 882 may begenerally similar to the optical imaging lens 1 (FIG. 6 depicting thefirst example embodiment), but the differences between the opticalimaging lens 1 and the optical imaging lens 8 may include the convex orconcave surface structures of the object-side surface 841. Additionaldifferences may include a radius of curvature, refracting power, athickness, aspherical data, and an effective focal length of each lenselement. More specifically, the object-side surface 841 of the fourthlens element 840 may comprise a concave portion 8411 in a vicinity ofthe optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 36 for the opticalcharacteristics of each lens elements in the optical imaging lens 8 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 35(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.02 mm. Referring to FIG. 35(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.03 mm. Referring to FIG. 35(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.03 mm.Referring to FIG. 35(d), the variation of the distortion aberration ofthe optical imaging lens 8 may be within about ±3.5%.

The values off T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller value of distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 9 having eight lenselements according to an ninth example embodiment. FIG. 39 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 9 according to the ninthembodiment. FIG. 40 shows an example table of optical data of each lenselement of the optical imaging lens 9 according to the ninth exampleembodiment. FIG. 41 shows an example table of aspherical data of theoptical imaging lens 9 according to the ninth example embodiment. Thereference numbers labeled in the present embodiment are similar to thosein the first embodiment for the similar elements, but here the referencenumbers are initialed with 9; for example, reference number 931 maylabel the object-side surface of the third lens element 930, referencenumber 932 may label the image-side surface of the third lens element930, etc.

As shown in FIG. 38, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 900, a first lens element910, a second lens element 920, a third lens element 930, a fourth lenselement 940, a fifth lens element 950, a sixth lens element 960, aseventh lens element 970 and an eighth lens element 980.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 911, 921, 931, 941, 951, 961, 971, 981 and theimage-side surfaces 912, 922, 932, 942, 952, 962, 972, 982 may begenerally similar to the optical imaging lens 1 (FIG. 6 depicting thefirst example embodiment), but the differences between the opticalimaging lens 1 and the optical imaging lens 9 may include a radius ofcurvature, a thickness, aspherical data, and an effective focal lengthof each lens element.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 40 for the opticalcharacteristics of each lens elements in the optical imaging lens 9 ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 39(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.03 mm. Referring to FIG. 39(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.05 mm. Referring to FIG. 39(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.06 mm.Referring to FIG. 39(d), the variation of the distortion aberration ofthe optical imaging lens 9 may be within about ±4%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74A and 74B.

In comparison with the first embodiment, this embodiment may havesmaller value of distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 10′ having eight lenselements according to an tenth example embodiment. FIG. 43 shows examplecharts of longitudinal spherical aberration and other kinds of opticalaberrations of the optical imaging lens 10′ according to the tenthembodiment. FIG. 44 shows an example table of optical data of each lenselement of the optical imaging lens 10′ according to the tenth exampleembodiment. FIG. 45 shows an example table of aspherical data of theoptical imaging lens 10′ according to the tenth example embodiment. Thereference numbers labeled in the present embodiment are similar to thosein the first embodiment for the similar elements, but here the referencenumbers are initialed with 10′; for example, reference number 10′31 maylabel the object-side surface of the third lens element 10′30, referencenumber 10′32 may label the image-side surface of the third lens element10′30, etc.

As shown in FIG. 42, the optical imaging lens 10′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 10′00, a first lenselement 10′10, a second lens element 10′20, a third lens element 10′30,a fourth lens element 10′40, a fifth lens element 10′50, a sixth lenselement 10′60, a seventh lens element 10′70 and an eighth lens element10′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 10′11, 10′21, 10′31, 10′71, 10′81 and theimage-side surfaces 10′12, 10′22, 10′32, 10′52, 10′72 may be generallysimilar to the optical imaging lens 1 (FIG. 6 depicting the firstexample embodiment), but the differences between the optical imaginglens 1 and the optical imaging lens 10′ may include the convex orconcave surface structures of the object-side surfaces 10′41, 10′51,10′61 and the image-side surfaces 10′42, 10′62, 10′82. Additionaldifferences may include a radius of curvature, a thickness, refractingpower, aspherical data, and an effective focal length of each lenselement. More specifically, the object-side surface 10′41 of the fourthlens element 10′40 may comprise a concave portion 10′411 in a vicinityof the optical axis, the image-side surface 10′42 of the fourth lenselement 10′40 may comprise a convex portion 10′422 in a vicinity of aperiphery of the fourth lens element 10′40, the object-side surface10′51 of the fifth lens element 10′50 may comprise a concave portion10′512 in a vicinity of a periphery of the fifth lens element 10′50, theobject-side surface 10′61 of the sixth lens element 10′60 may comprise aconvex portion 10′612 in a vicinity of a periphery of the sixth lenselement 10′60, the image-side surface 10′62 of the sixth lens element10′60 may comprise a concave portion 10′622 in a vicinity of a peripheryof the sixth lens element 10′60, and the image-side surface 10′82 of theeighth lens element 10′80 may comprise a concave portion 10′822 in avicinity of a periphery of the eighth lens element 10′80.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 44 for the opticalcharacteristics of each lens elements in the optical imaging lens 10′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 43(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.025 mm. Referring to FIG. 43(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.04 mm. Referring to FIG. 43(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.02 mm.Referring to FIG. 43(d), the variation of the distortion aberration ofthe optical imaging lens 10′ may be within about ±8%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration and astigmatismaberration, so that it may have better imaging quality.

Reference is now made to FIGS. 46-49. FIG. 46 illustrates an examplecross-sectional view of an optical imaging lens 11′ having eight lenselements according to an eleventh example embodiment. FIG. 47 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 11′ according to theeleventh embodiment. FIG. 48 shows an example table of optical data ofeach lens element of the optical imaging lens 11′ according to theeleventh example embodiment. FIG. 49 shows an example table ofaspherical data of the optical imaging lens 11′ according to theeleventh example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 11′;for example, reference number 11′31 may label the object-side surface ofthe third lens element 11′30, reference number 11′32 may label theimage-side surface of the third lens element 11′30, etc.

As shown in FIG. 46, the optical imaging lens 11′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 11′00, a first lenselement 11′10, a second lens element 11′20, a third lens element 11′30,a fourth lens element 11′40, a fifth lens element 11′50, a sixth lenselement 11′60, a seventh lens element 11′70 and an eighth lens element11′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 11′11, 11′21, 11′31, 11′51, 11′61, 11′71, 11′81and the image-side surfaces 11′12, 11′22, 11′32, 11′42, 11′52, 11′62,11′72, 11′82 may be generally similar to the optical imaging lens 1(FIG. 6 depicting the first example embodiment), but the differencesbetween the optical imaging lens 1 and the optical imaging lens 11′ mayinclude the convex or concave surface structures of the object-sidesurface 11′41. Additional differences may include a radius of curvature,a thickness, refracting power, aspherical data, and an effective focallength of each lens element. More specifically, the object-side surface11′41 of the fourth lens element 11′40 may comprise a concave portion11′411 in a vicinity of the optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 48 for the opticalcharacteristics of each lens elements in the optical imaging lens 11′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 47(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.025 mm. Referring to FIG. 47(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.03 mm. Referring to FIG. 47(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.03 mm.Referring to FIG. 47(d), the variation of the distortion aberration ofthe optical imaging lens 11′ may be within about ±4%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration, astigmatismaberration, and distortion aberration, so that it may have betterimaging quality.

Reference is now made to FIGS. 50-53. FIG. 50 illustrates an examplecross-sectional view of an optical imaging lens 12′ having eight lenselements according to an twelfth example embodiment. FIG. 51 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 12′ according to thetwelfth embodiment. FIG. 52 shows an example table of optical data ofeach lens element of the optical imaging lens 12′ according to thetwelfth example embodiment. FIG. 53 shows an example table of asphericaldata of the optical imaging lens 12′ according to the twelfth exampleembodiment. The reference numbers labeled in the present embodiment aresimilar to those in the first embodiment for the similar elements, buthere the reference numbers are initialed with 12′; for example,reference number 12′31 may label the object-side surface of the thirdlens element 12′30, reference number 12′32 may label the image-sidesurface of the third lens element 12′30, etc.

As shown in FIG. 50, the optical imaging lens 12′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 12′00, a first lenselement 12′10, a second lens element 12′20, a third lens element 12′30,a fourth lens element 12′40, a fifth lens element 12′50, a sixth lenselement 12′60, a seventh lens element 12′70 and an eighth lens element12′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 12′11, 12′21, 12′31, 12′41, 12′51, 12′61,12′71, 12′81 and the image-side surfaces 12′12, 12′22, 12′32, 12′42,12′52, 12′62, 12′72, 12′82 may be generally similar to the opticalimaging lens 1 (FIG. 6 depicting the first example embodiment), but thedifferences between the optical imaging lens 1 and the optical imaginglens 12′ may include a radius of curvature, a thickness, refractingpower, aspherical data, and an effective focal length of each lenselement.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 52 for the opticalcharacteristics of each lens elements in the optical imaging lens 12′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 51(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.1 mm. Referring to FIG. 51(b), the focus variation with respectto the three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield may fall within about ±0.12 mm. Referring to FIG. 51(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field may fall within about ±0.12 mm. Referringto FIG. 51(d), the variation of the distortion aberration of the opticalimaging lens 12′ may be within about ±16%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, TTL of this embodiment may beabout 6.578 mm, so that the optical imaging lens 12′ has smallerthickness.

Reference is now made to FIGS. 54-57. FIG. 54 illustrates an examplecross-sectional view of an optical imaging lens 13′ having eight lenselements according to an thirteenth example embodiment. FIG. 55 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 13′ according to thethirteenth embodiment. FIG. 56 shows an example table of optical data ofeach lens element of the optical imaging lens 13′ according to thethirteenth example embodiment. FIG. 57 shows an example table ofaspherical data of the optical imaging lens 13′ according to thethirteenth example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 13′;for example, reference number 13′31 may label the object-side surface ofthe third lens element 13′30, reference number 13′32 may label theimage-side surface of the third lens element 13′30, etc.

As shown in FIG. 54, the optical imaging lens 13′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 13′00, a first lenselement 13′10, a second lens element 13′20, a third lens element 13′30,a fourth lens element 13′40, a fifth lens element 13′50, a sixth lenselement 13′60, a seventh lens element 13′70 and an eighth lens element13′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 13′11, 13′21, 13′31, 13′51, 13′61, 13′71, 13′81and the image-side surfaces 13′12, 13′22, 13′32, 13′42, 13′52, 13′62,13′72, 13′82 may be generally similar to the optical imaging lens 1(FIG. 6 depicting the first example embodiment), but the differencesbetween the optical imaging lens 1 and the optical imaging lens 13′ mayinclude the convex or concave surface structures of the object-sidesurface 13′41. Additional differences may include a radius of curvature,a thickness, refracting power, aspherical data, and an effective focallength of each lens element. More specifically, the object-side surface13′41 of the fourth lens element 13′40 may comprise a concave portion13′411 in a vicinity of the optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 56 for the opticalcharacteristics of each lens elements in the optical imaging lens 13′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 55(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.03 mm. Referring to FIG. 55(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.035 mm. Referring to FIG.55(c), the focus variation with respect to the three differentwavelengths (470 nm, 555 nm, 650 nm) in the whole field may fall withinabout ±0.03 mm. Referring to FIG. 55(d), the variation of the distortionaberration of the optical imaging lens 13′ may be within about ±3.5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, TTL of this embodiment may beabout 6.578 mm, so that the optical imaging lens 13′ has smallerthickness. Moreover, this embodiment may have smaller values ofastigmatism aberration and distortion aberration, so that it may havebetter imaging quality.

Reference is now made to FIGS. 58-61. FIG. 58 illustrates an examplecross-sectional view of an optical imaging lens 14′ having eight lenselements according to an fourteenth example embodiment. FIG. 59 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 14′ according to thefourteenth embodiment. FIG. 60 shows an example table of optical data ofeach lens element of the optical imaging lens 14′ according to thefourteenth example embodiment. FIG. 61 shows an example table ofaspherical data of the optical imaging lens 14′ according to thefourteenth example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 14′;for example, reference number 14′31 may label the object-side surface ofthe third lens element 14′30, reference number 14′32 may label theimage-side surface of the third lens element 14′30, etc.

As shown in FIG. 58, the optical imaging lens 14′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 14′00, a first lenselement 14′10, a second lens element 14′20, a third lens element 14′30,a fourth lens element 14′40, a fifth lens element 14′50, a sixth lenselement 14′60, a seventh lens element 14′70 and an eighth lens element14′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 14′11, 14′21, 14′31, 14′41, 14′51, 14′61,14′71, 14′81 and the image-side surfaces 14′12, 14′22, 14′32, 14′42,14′52, 14′62, 14′72, 14′82 may be generally similar to the opticalimaging lens 1 (FIG. 6 depicting the first example embodiment), but thedifferences between the optical imaging lens 1 and the optical imaginglens 14′ may include a radius of curvature, a thickness, refractingpower, aspherical data, and an effective focal length of each lenselement.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 60 for the opticalcharacteristics of each lens elements in the optical imaging lens 14′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 59(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.016 mm. Referring to FIG. 59(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.03 mm. Referring to FIG. 59(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.03 mm.Referring to FIG. 59(d), the variation of the distortion aberration ofthe optical imaging lens 14′ may be within about ±4.5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, this embodiment may havesmaller values of longitudinal spherical aberration, astigmatismaberration and distortion aberration, so that it may have better imagingquality.

Reference is now made to FIGS. 62-65. FIG. 62 illustrates an examplecross-sectional view of an optical imaging lens 15′ having eight lenselements according to an fifteenth example embodiment. FIG. 63 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 15′ according to thefifteenth embodiment. FIG. 64 shows an example table of optical data ofeach lens element of the optical imaging lens 15′ according to thefifteenth example embodiment. FIG. 65 shows an example table ofaspherical data of the optical imaging lens 15′ according to thefifteenth example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 15′;for example, reference number 15′31 may label the object-side surface ofthe third lens element 15′30, reference number 15′32 may label theimage-side surface of the third lens element 15′30, etc.

As shown in FIG. 62, the optical imaging lens 15′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 15′00, a first lenselement 15′10, a second lens element 15′20, a third lens element 15′30,a fourth lens element 15′40, a fifth lens element 15′50, a sixth lenselement 15′60, a seventh lens element 15′70 and an eighth lens element15′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 15′11, 15′21, 15′31, 15′51, 15′61, 15′71, 15′81and the image-side surfaces 15′12, 15′22, 15′32, 15′42, 15′52, 15′62,15′72, 15′82 may be generally similar to the optical imaging lens 1(FIG. 6 depicting the first example embodiment), but the differencesbetween the optical imaging lens 1 and the optical imaging lens 15′ mayinclude the convex or concave surface structures of the object-sidesurface 15′41. Additional differences may a radius of curvature, athickness, refracting power, aspherical data, and an effective focallength of each lens element. More specially, the object-side surface15′41 of the fourth lens element 15′40 may comprise a concave portion15′411 in a vicinity of the optical axis.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 64 for the opticalcharacteristics of each lens elements in the optical imaging lens 15′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 63(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.045 mm. Referring to FIG. 63(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.05 mm. Referring to FIG. 63(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.03 mm.Referring to FIG. 63(d), the variation of the distortion aberration ofthe optical imaging lens 15′ may be within about ±5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, this embodiment may havesmaller values of astigmatism aberration and distortion aberration, sothat it may have better imaging quality.

Reference is now made to FIGS. 66-69. FIG. 66 illustrates an examplecross-sectional view of an optical imaging lens 16′ having eight lenselements according to an sixteenth example embodiment. FIG. 67 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 16′ according to thesixteenth embodiment. FIG. 68 shows an example table of optical data ofeach lens element of the optical imaging lens 16′ according to thesixteenth example embodiment. FIG. 69 shows an example table ofaspherical data of the optical imaging lens 16′ according to thesixteenth example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 16′;for example, reference number 16′31 may label the object-side surface ofthe third lens element 16′30, reference number 16′32 may label theimage-side surface of the third lens element 16′30, etc.

As shown in FIG. 66, the optical imaging lens 16′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element 16′10, an aperturestop 16′00, a second lens element 16′20, a third lens element 16′30, afourth lens element 16′40, a fifth lens element 16′50, a sixth lenselement 16′60, a seventh lens element 16′70 and an eighth lens element16′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 16′11, 16′21, 16′31, 16′41, 16′61, 16′71 andthe image-side surfaces 16′12, 16′22, 16′42, 16′62, 16′72, 16′82 may begenerally similar to the optical imaging lens 1 (FIG. 6 depicting thefirst example embodiment), but the differences between the opticalimaging lens 1 and the optical imaging lens 16′ may include the convexor concave surface structures of the object-side surfaces 16′41, 16′81and the image-side surfaces 16′32, 16′52. Additional differences may aradius of curvature, a thickness, refracting power, aspherical data, andan effective focal length of each lens element. More specially, theimage-side surface 16′32 of the third lens element 16′30 may comprise aconvex portion 16′321 in a vicinity of the optical axis, the object-sidesurface 16′51 of the fifth lens element 16′50 may comprise a concaveportion 16′512 in a vicinity of a periphery of the fifth lens element16′50, the image-side surface 16′52 of the fifth lens element 16′50 maycomprise a convex portion 16′521 in a vicinity of the optical axis, theobject-side surface 16′81 of the eighth lens element 16′80 may comprisea convex portion 16′812 in a vicinity of a periphery of the eighth lenselement 16′80, and the aperture stop 16′00 may be disposed between thefirst lens element 16′10 and the second lens element 16′20.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 68 for the opticalcharacteristics of each lens elements in the optical imaging lens 16′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 67(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.025 mm. Referring to FIG. 67(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.03 mm. Referring to FIG. 67(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.03 mm.Referring to FIG. 67(d), the variation of the distortion aberration ofthe optical imaging lens 16′ may be within about ±6%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T1+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, TTL of this embodiment may beabout 6.647 mm, so that it the optical imaging lens 16′ has smallerthickness. Moreover, this embodiment may have smaller values oflongitudinal spherical aberration and astigmatism aberration, so that itmay have better imaging quality.

Reference is now made to FIGS. 70-73. FIG. 70 illustrates an examplecross-sectional view of an optical imaging lens 17′ having eight lenselements according to an seventeenth example embodiment. FIG. 71 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 17′ according to theseventeenth embodiment. FIG. 72 shows an example table of optical dataof each lens element of the optical imaging lens 17′ according to theseventeenth example embodiment. FIG. 73 shows an example table ofaspherical data of the optical imaging lens 17′ according to theseventeenth example embodiment. The reference numbers labeled in thepresent embodiment are similar to those in the first embodiment for thesimilar elements, but here the reference numbers are initialed with 17′;for example, reference number 17′31 may label the object-side surface ofthe third lens element 17′30, reference number 17′32 may label theimage-side surface of the third lens element 17′30, etc.

As shown in FIG. 70, the optical imaging lens 17′ of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop 17′00, a first lenselement 17′10, a second lens element 17′20, a third lens element 17′30,a fourth lens element 17′40, a fifth lens element 17′50, a sixth lenselement 17′60, a seventh lens element 17′70 and an eighth lens element17′80.

The arrangements of the convex or concave surface structures, includingthe object-side surfaces 17′11, 17′21, 17′41, 17′51, 17′61, 17′71, 17′81and the image-side surfaces 17′12, 17′22, 17′32, 17′42, 17′52, 17′62,17′72, 17′82 may be generally similar to the optical imaging lens 1(FIG. 6 depicting the first example embodiment), but the differencesbetween the optical imaging lens 1 and the optical imaging lens 17′ mayinclude the convex or concave surface structures of the object-sidesurfaces 17′31. Additional differences may a radius of curvature, athickness, refracting power, aspherical data, and an effective focallength of each lens element. More specially, the object-side surface17′31 of the third lens element 17′30 may comprise a concave portion17′312 in a vicinity of a periphery of the third lens element 17′30.

Here, in the interest of clearly showing the drawings of a particularembodiment, only the surface shapes which are different from that in thefirst embodiment may be labeled. Please refer to FIG. 72 for the opticalcharacteristics of each lens elements in the optical imaging lens 17′ ofthe present embodiment.

From the vertical deviation of each curve shown in FIG. 71(a), theoffset of the off-axis light relative to the image point may be withinabout ±0.06 mm. Referring to FIG. 71(b), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field may fall within about ±0.08 mm. Referring to FIG. 71(c),the focus variation with respect to the three different wavelengths (470nm, 555 nm, 650 nm) in the whole field may fall within about ±0.1 mm.Referring to FIG. 71(d), the variation of the distortion aberration ofthe optical imaging lens 17′ may be within about ±5%.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T I+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of this embodimentmay be referred to FIGS. 74C and 74D.

In comparison with the first embodiment, this embodiment may havesmaller value of distortion aberration, so that it may have betterimaging quality.

The values of T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7,G78, T8, G8F, TF, GFP, BFL, EFL, TTL, TL, ALT, AAG, Tmax, Tmin,(V5+V6+V7+V8)−(V1+V2+V3+V4), AAG/(G67+G78), ALT/(T2+T4), TL/EFL,(T3+T5)/T8, TTL/(T5+T6), (T7+G78)/(T1+G12), BFL/Tmin, Tmax/(T2+G23),(T4+T5)/(G34+G45+G56), T7/T8, (G45+G78)/(T I+T2), TL/BFL,(T3+T6)/(G12+G23+G34), AAG/(G56+G67+G78), ALT/(T5+T6), EFL/Tmax,(T7+T8)/T3, (T2+T4)/(G23+G45), AAG/(G12+G34+G56+G67) of all embodimentmay be referred to in FIGS. 74A to 74D, and it is clear that the opticalimaging lens of any one of the ten embodiments may satisfy theInequalities (1) to (20).

Combinations of the optical parameters disclosed in the variousembodiments of the present disclosure may be represented ranges ofvalues defined by minimum and maximum values of each term. As such,values within the ranges of maximum and/or minimum values of each termmay be contemplated and/or otherwise utilized herein.

The optical imaging lens of the present disclosure may have at least thetechnical performances described below: the object-side surface of thefirst lens element comprising a convex portion in a vicinity of theoptical axis may assist for congregating light; the image-side surfaceof the second lens element comprising a concave portion in a vicinity ofthe optical axis may decrease the aberration caused by the first lenselement and if the image-side surface of the third lens elementcomprising a convex portion in a vicinity of a periphery of the thirdlens element, the object-side surface of the fourth lens elementcomprising a concave portion in a vicinity of a periphery of the fourthlens element, the image-side surface of the sixth lens elementcomprising a convex portion in a vicinity of the optical axis, and theobject-side surface of the seventh lens element comprising a convexportion in a vicinity of the optical axis may decrease aberration andthe value of Fno; When the optical imaging lens satisfy the inequality:(V5+V6+V7+V8)−(V1+V2+V3+V4)≥35.000, the dispersion can be decreased. Insome embodiments, the optical imaging lens may satisfy35.000≤(V5+V6+V7+V8)−(V1+V2+V3+V4)≤72.000.

For shortening the length of the optical imaging lens and maintainingthe imaging quality, one of ordinary skill in the art having the benefitof the present disclosure may decrease a gap between two lens element orthe thicknesses of lens elements. However, one of ordinary skill in theart having the benefit of the present disclosure may need to considerthe difficulty of the manufacture of the optical imaging lens. In someembodiments, an optical imaging lens may satisfy any one of inequalitiesas follows:

AAG/(G67+G78)≤6.000, and 1.500≤AAG/(G67+G78)≤6.000;

ALT/(T2+T4)≥5.500, and 5.500≤ALT/(T2+T4)≤10.500;

TL/EFL≤2.800, and 1.000≤TL/EFL≤2.800;

(T3+T5)/T8≥2.000, and 2.000≤(T3+T5)/T8≤12.000;

TTL/(T5+T6)≤6.200, and 3.500≤TTL/(T5+T6)≤6.200;

(T7+G78)/(T1+G12)≥1.500, and 1.500≤(T7+G78)/(T1+G12)≤3.500;

BFL/T min≤6.100, and 1.500≤BFL/T min≤6.100;

T max/(T2+G23)≤3.000, and 1.500≤T max/(T2+G23)≤3.000;

(T4+T5)/(G34+G45+G56)≤2.500, and 0.200≤(T4+T5)/(G34+G45+G56)≤2.500;

T7/T8≥1.500, and 1.500≤T7/T8≤11.000;

(G45+G78)/(T1+T2)≥1.000, and 1.000≤(G45+G78)/(T1+T2)≤2.500;

TL/BFL≥4.300, and 4.300≤TL/BFL≤17.000;

(T3+T6)/(G12+G23+G34)≥1.900, and 1.900≤(T3+T6)/(G12+G23+G34)≤5.000;

AAG/(G56+G67+G78)≤3.000, and 1.300≤AAG/(G56+G67+G78)≤3.000;

ALT/(T5+T6)≤4.000, and 2.300≤ALT/(T5+T6)≤4.000;

EFL/T max≥3.000, and 3.000≤EFL/T max≤7.000;

(T7+T8)/T3≤2.200, and 0.900≤(T7+T8)/T3≤2.200;

(T2+T4)/(G23+G45)≤3.000, and 0.400≤(T2+T4)/(G23+G45)≤3.000; and

AAG/(G12+G34+G56+G67)≥2.500, and 2.500≤AAG/(G12+G34+G56+G67)≤3.800.

While various embodiments in accordance with the disclosed principlesbeen described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof exemplary embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. § 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens comprising a first lenselement, a second lens element, a third lens element, a fourth lenselement, a fifth lens element, a sixth lens element, a seventh lenselement and an eighth lens element sequentially from an object side toan image side along an optical axis, each of the first, second, third,fourth, fifth, sixth, seventh and eighth lens elements having anobject-side surface facing toward the object side and allowing imagingrays to pass through and an image-side surface facing toward the imageside and allowing the imaging rays to pass through, wherein: theobject-side surface of the first lens element comprises a convex portionin a vicinity of the optical axis; the image-side surface of the secondlens element comprises a concave portion in a vicinity of the opticalaxis; the image-side surface of the third lens element comprises aconvex portion in a vicinity of a periphery of the third lens element;the object-side surface of the fourth lens element comprises a concaveportion in a vicinity of a periphery of the fourth lens element; thefifth lens element is a plastic lens element; the image-side surface ofthe sixth lens element comprises a convex portion in a vicinity of theoptical axis; the object-side surface of the seventh lens elementcomprises a convex portion in a vicinity of the optical axis; the eighthlens element is a plastic lens element; an Abbe number of the first lenselement is represented by V1, an Abbe number of the second lens elementis represented by V2, an Abbe number of the third lens element isrepresented by V3, an Abbe number of the fourth lens element isrepresented by V4, an Abbe number of the fifth lens element isrepresented by V5, an Abbe number of the sixth lens element isrepresented by V6, an Abbe number of the seventh lens element isrepresented by V7, an Abbe number of the eighth lens element isrepresented by V8, and the optical imaging lens has refracting powersonly for the first, second, third, fourth, fifth, sixth, seventh andeighth lens elements and satisfies an inequality:(V5+V6+V7+V8)−(V1+V2+V3+V4)≥35.000
 2. The optical imaging lens accordingto claim 1, wherein a sum of seven air gaps from the first to the eighthlens elements along the optical axis is represented by AAG, an air gapbetween the sixth lens element and the seventh lens element along theoptical axis is represented by G67, an air gap between the seventh lenselement and the eighth lens element along the optical axis isrepresented by G78, and the optical imaging lens further satisfies aninequality: AAG/(G67+G78)≤6.000.
 3. The optical imaging lens accordingto claim 1, wherein a sum of thicknesses of all eight lens elements fromthe first to the eighth lens elements along the optical axis isrepresented by ALT, a thickness of the second lens element along theoptical axis is represented by T2, a thickness of the fourth lenselement along the optical axis is represented by T4, and the opticalimaging lens further satisfies an inequality: ALT/(T2+T4)≥5.500.
 4. Theoptical imaging lens according to claim 1, wherein a distance from theobject-side surface of the first lens element to the image-side surfaceof the eighth lens element along the optical axis is represented by TL,an effective focal length of the optical imaging lens is represented byEFL, and the optical imaging lens further satisfies an inequality:TL/EFL≤2.800.
 5. The optical imaging lens according to claim 1, whereina thickness of the third lens element along the optical axis isrepresented by T3, a thickness of the fifth lens element along theoptical axis is represented by T5, a thickness of the eighth lenselement along the optical axis is represented by T8, and the opticalimaging lens further satisfies an inequality: (T3+T5)/T8≥2.000.
 6. Theoptical imaging lens according to claim 1, wherein a distance betweenthe object-side surface of the first lens element and an image planealong the optical axis is represented by TTL, a thickness of the fifthlens element along the optical axis is represented by T5, a thickness ofthe sixth lens element along the optical axis is represented by T6, andthe optical imaging lens further satisfies an inequality:TTL/(T5+T6)≤6.200.
 7. The optical imaging lens according to claim 1,wherein a thickness of the seventh lens element along the optical axisis represented by T7, an air gap between the seventh lens element andthe eighth lens element along the optical axis is represented by G78, athickness of the first lens element along the optical axis isrepresented by T1, an air gap between the first lens element and thesecond lens element along the optical axis is represented by G12, andthe optical imaging lens further satisfies an inequality:(T7+G78)/(T1+G12)≥1.500.
 8. The optical imaging lens according to claim1, wherein a distance from the image-side surface of the eighth lenselement to an image plane along the optical axis is represented by BFL,a minimum thickness of all eight lens elements from the first lenselement to the eighth lens element along an optical axis is representedby Tmin, and the optical imaging lens further satisfies an inequality:BFL/Tmin≤6.100.
 9. The optical imaging lens according to claim 1,wherein a maximum thickness of all eight lens elements from the firstlens element to the eighth lens element along an optical axis isrepresented by Tmax, a thickness of the second lens element along theoptical axis is represented by T2, an air gap between the second lenselement and the third lens element along the optical axis is representedby G23, and the optical imaging lens further satisfies an inequality:Tmax/(T2+G23)≤3.000.
 10. The optical imaging lens according to claim 1,wherein a thickness of the fourth lens element along the optical axis isrepresented by T4, a thickness of the fifth lens element along theoptical axis is represented by T5, an air gap between the third lenselement and the fourth lens element along the optical axis isrepresented by G34, an air gap between the fourth lens element and thefifth lens element along the optical axis is represented by G45, an airgap between the fifth lens element and the sixth lens element along theoptical axis is represented by G56, and the optical imaging lens furthersatisfies an inequality: (T4+T5)/(G34+G45+G56)≤2.500.
 11. The opticalimaging lens according to claim 1, wherein a thickness of the seventhlens element along the optical axis is represented by T7, a thickness ofthe eighth lens element along the optical axis is represented by T8, andthe optical imaging lens further satisfies an inequality: T7/T8≥1.500.12. The optical imaging lens according to claim 1, wherein an air gapbetween the fourth lens element and the fifth lens element along theoptical axis is represented by G45, an air gap between the seventh lenselement and the eighth lens element along the optical axis isrepresented by G78, a thickness of the first lens element along theoptical axis is represented by T1, a thickness of the second lenselement along the optical axis is represented by T2, and the opticalimaging lens further satisfies an inequality: (G45+G78)/(T1+T2)≥1.000.13. The optical imaging lens according to claim 1, wherein a distancefrom the object-side surface of the first lens element to the image-sidesurface of the eighth lens element along the optical axis is representedby TL, a distance from the image-side surface of the eighth lens elementto an image plane along the optical axis is represented by BFL, and theoptical imaging lens further satisfies an inequality: TL/BFL≥4.300. 14.The optical imaging lens according to claim 1, wherein a thickness ofthe third lens element along the optical axis is represented by T3, athickness of the sixth lens element along the optical axis isrepresented by T6, an air gap between the first lens element and thesecond lens element along the optical axis is represented by G12, an airgap between the second lens element and the third lens element along theoptical axis is represented by G23, an air gap between the third lenselement and the fourth lens element along the optical axis isrepresented by G34, and the optical imaging lens further satisfies aninequality: (T3+T6)/(G12+G23+G34)≥1.900.
 15. The optical imaging lensaccording to claim 1, wherein a sum of seven air gaps from the first tothe eighth lens elements along the optical axis is represented by AAG,an air gap between the fifth lens element and the sixth lens elementalong the optical axis is represented by G56, an air gap between thesixth lens element and the seventh lens element along the optical axisis represented by G67, an air gap between the seventh lens element andthe eighth lens element along the optical axis is represented by G78,and the optical imaging lens further satisfies an inequality:AAG/(G56+G67+G78)≤3.000.
 16. The optical imaging lens according to claim1, wherein a sum of thicknesses of all eight lens elements from thefirst to the eighth lens elements along the optical axis is representedby ALT, a thickness of the fifth lens element along the optical axis isrepresented by T5, a thickness of the sixth lens element along theoptical axis is represented by T6, and the optical imaging lens furthersatisfies an inequality: ALT/(T5+T6)≤4.000.
 17. The optical imaging lensaccording to claim 1, wherein an effective focal length of the opticalimaging lens is represented by EFL, a maximum thickness of all eightlens elements from the first lens element to the eighth lens elementalong an optical axis is represented by Tmax, and the optical imaginglens further satisfies an inequality: EFL/Tmax≥3.000.
 18. The opticalimaging lens according to claim 1, wherein a thickness of the third lenselement along the optical axis is represented by T3, a thickness of theseventh lens element along the optical axis is represented by T7, athickness of the eighth lens element along the optical axis isrepresented by T8, and the optical imaging lens further satisfies aninequality: (T7+T8)/T3≤2.200.
 19. The optical imaging lens according toclaim 1, wherein a thickness of the second lens element along theoptical axis is represented by T2, a thickness of the fourth lenselement along the optical axis is represented by T4, an air gap betweenthe second lens element and the third lens element along the opticalaxis is represented by G23, an air gap between the fourth lens elementand the fifth lens element along the optical axis is represented by G45,and the optical imaging lens further satisfies an inequality:(T2+T4)/(G23+G45)≤3.300.
 20. The optical imaging lens according to claim1, wherein a sum of seven air gaps from the first to the eighth lenselements along the optical axis is represented by AAG, an air gapbetween the first lens element and the second lens element along theoptical axis is represented by G12, an air gap between the third lenselement and the fourth lens element along the optical axis isrepresented by G34, an air gap between the fifth lens element and thesixth lens element along the optical axis is represented by G56, an airgap between the sixth lens element and the seventh lens element alongthe optical axis is represented by G67, and the optical imaging lensfurther satisfies an inequality: AAG/(G12+G34+G56+G67)≥2.500.